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在JTable中设置列的大小

我有扩展JTable的类,我有类实现TableModel,DefaultActionTableModel

public class RingTable extends JTable {

    private static final long serialVersionUID = -2828916773705542169L;
    private RingTableModel model;

    public RingTable () {
    }

    public RingTable (List<String> columns) { // NO_UCD
        model = new RingTableModel(columns);
        setModel(model);
    }

    public RingTable (List<String> columns, List<TableRing> tableRings) {
        model = new RingTableModel(columns, tableRings);
        setModel(model);
    }

    /**
     * Dodaje novu vrstu u tabelu sa zadatim indeksom
     * @param i
     */
    public void addRow(int i) {
        model.addRow(i);
    }


    public boolean addRow(TableRing tableRing) { …
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java swing jtable column-width

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